Communicating with your child
All instances of the ChildProcess object extend EventEmitter, exposing events useful for managing child data connections. Additionally, ChildProcess objects expose some useful methods for interacting with children directly. Let's go through those now, beginning with attributes and methods:
child.connected: When a child is disconnected from its parent viachild.disconnect(), this flag will be set tofalse.child.stdin: This is aWritableStreamcorresponding to the child's standard in.child.stdout: This is aReadableStreamcorresponding to the child's standard out.child.stderr: This is aReadableStreamcorresponding to the child's standard error.child.pid: This is an integer representing the process ID (PID) assigned to the child process.child.kill: This tries to terminate a child process, sending it an optional signal. If no signal is specified, the default isSIGTERM(for more about signals, see http://unixhelp.ed.ac.uk/CGI/man-cgi?signal+7). While the method...
